Plain-text spreadsheet with formulas

Do small spreadsheet work in plain text that both AI and humans can edit

Problem

Small tasks like tracking a dog's health records or organizing tax documents feel overkill in a full spreadsheet app, while Markdown tables have no formulas. Worse, when AI is asked to help inside a spreadsheet it usually needs spreadsheet-specific tools or export formats, so it cannot directly read and edit the workbook.

Solution

Define a compact, readable plain-text spreadsheet format with basic formulas and cross-sheet references, plus a lightweight editor. Because the file is plain text, AI can read, modify and explain it directly, while humans get a grid view in the editor.

Users

Individuals doing light tracking, plain-text-loving developers, small teams wanting AI to edit sheets directly

MVP

Plain-text spreadsheet spec with formulas; lightweight desktop/web editor with grid view; formula evaluation and dependency checks; CSV/Markdown export; example prompts for AI read/write

Revenue

Free for individuals, one-time Pro license with formula library and multi-sheet links; team subscription

Why now

LLMs now handle structured text reliably, and plain-text sheets let AI edit tables without special tooling, filling a real gap between spreadsheets and Markdown tables